- Hidden air slots giving ample ventilation
- Extended ventilation on 35SA-7 and 35SA-10
- Insulated top cover to prevent condensation
- 2 types of backboards available: Water resistant chipboard and water resistant chipboard clad with aluminium
- Root for in-ground installation included on all models
- Unique for installation of CATV or Telco equipment
- Brass cylinder lock
- Triangular lock on 20SA-1
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